<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    .content {
      display: flex;
      justify-content: space-around;
      background: yellow;
    }

    .box {
      width: 100px;
      height: 100px;
      background: red;
    }
  </style>
</head>

<body>
  <div class="content">
    <div class="box"></div>
    <div class="box"></div>
  </div>
</body>

</html>